Control Line: Scale

ELECTRONIC control system Part III month concludes three-pan series setting up operating two-channel electronic control system earlier columns explained en coder decoder included information system operation month Ill discuss overall wiring batteries insulated wire control lines method insulating connectors Sketch shows overall system wiring battery pack encoder through insulated control lines decoder servo Note major components sys tem connectorized using Deans connec tors easy disassembly storage trouble shooting As noted January column 96-volt battery supply B-i sketch made plastic box Radio Shack two 48-volt 500-rnAh AA Ni-Cd packs wired ser ies single-pole single-throw on/off switch can use either toggle slide switch recommend slide type Accidental turn-on turnoff likely occur toggle switch Sketch B shows decoder battery supply wir ing Ni-Cd batteries connection charging batteries removing model project battery supply shown B-2 48-volt 550-mAh AA pack Ace R/C #381505 sketch shows double-pole double-throw DPDT switch used switching battery supply either decoder battery charger via Deans connector prefer charge battery pack outside model DPDT switch charging Deans connector can replaced single-pole switch model has removable wing access batteries servos decoder should no problem Otherwise youll need provide ac Sketch shows overall wiring electronic control system pieces fit together Sketch B shows decoder battery supply wiring used Ni-Cd batteries Note battery charger connection allows charge batteries removing model Also note major components connectorized Bill updated six-year-old P-39 Airacobra Top Flite kit gear retraction dependent flap operation via two-channel electronic control system featured threepart series removable panel under dummy exhaust provides access flap servo battery compartment decoder gear retraction servo reached through remov able panel under wing paint scheme borrowed Airacobra No 601 AH 577 County London Squadron Duxford Throttle control three-line system cess through removable panels like switch and/or charger connection can easily hidden open cockpit cockpit slid ing canopy wheel well Use ingenuity find other good places Conventional 15-volt dry cell batteries may substituted Ni-Cd batteries indicated Six batteries would required B- 1 power sup ply four B-2 supply youre serious Continued page 170 Left parts youll need make insulating line clips completed clip attached insulated lines right 0 Note Deans connector linkage model encoder output insulated clips allow attach insulated lines required operation electronic control system type handle belicrank system Right Insulated lines attached lead-outs threeline GS belicrank system Deans connector attaches lines decoder Note half connector buried wing tip March 1991 67 Conoi Line Scale Bill Boss 77-06 269th Street New Hyde Park NY 11040 MODEL DEANS CONNECTORS IDECODER ID TO SKETcH-S SKEIkIL.SERVO .TO DECODER 4AV BATTERY BAT lERY 4CHARGER opor4CONNECTION SWITCH Leader Small Airfoil Technology MASTE 11 AIRSCREW Efficient wide tips thinner airfoil sections combine greater thrust noise suppresion Will out-perform wood & other plastics water sand & gravel runways Made strong 33% glass-filled nylon RPM rating 160K divided diameter 1/2A Series 55x4 55x45 6x35 6x3 6x4$ 99 GIF Series 7x4 7x6125 8x48x6135 9x4 9x5 9x6 9x8 95x6155 10x6 10x7 10x8.. 175 11x6 11x7 inches 11x75 11x9195 K Series 12x6 12x8 13x6 13x8 14x6 14x8 15x8 15x10 285 385 495 545 16x6 16x8665 Antique Series lOxS225 11x6 12x6 13x6 14x7 16x7 245 335 435 545 715 See local hobby dealer Master Airscrew propellers accessories Windsor Propeller Co 3219 Monier Circle Rancho Cordova CA 95742 condido CA 92025 tel 1-619/743-5458 3 WheelsPerformance Specialties PO Box 4003 Carlsbad CA 92008 tel 1-619/729-1658 4 Kraft wheelsCalifornia Speed Pros 32221 Alipaz #115 San Juan Capistrano CA 92675 tel 1-714/661-7430 5 Prop balancerHigh Point hobby stores 6 Pitch gaugePrather Products 1660 Revenna Wilmington CA 90744 tel 1-213/835-4764 7 Royal Pro TackTack R/C Box 24593 Denver CO 80224 1-303/7574082 8 Carbon props sport props custom foam workBarrys Model Products Barry West 600 vincent Mt Dora FL 32757 tel 1904/383-1122 Quarter Midget Kits 1 Estrellita Heinkel II Spitfire Toni FirecrackerGager Aircraft Supply 8425 Au burn Ft Wayne IN 46825 tel 1-219/4895060 2 Napair HestonCalifornia Speed Pros 32221 Alipaz #115 San Juan Capistrano CA 92675 tel 1-714/861-7430 3 Shark Deja vu NapairQuality Fiberglass Bob Sealy 521 96th Blame MN 55434 tel 1-612/780-2737 4 Rivets LatshaMatney Models Kevin Mat ney 11325 Harold Luna Pier MI 48157 tel 1313/848-8195 5 AJ Special ME-109 Fol kertsJim DeYoung 16627 Dobson South Hol land IL 60473 tel 1-312/339-9541 6 P-39 KS METAL AluminumlBrasslCopper Tubing & Shapes Music Wire S loch Soldenng Irons Silk Silk Span Finishing Mateuials Send 2K catalog KSrina 6917 P-63Greg Doe 407 Pony Smyrna TN 37167 tel 1-615/459-6845 7 NapairCalifornia Speed Pros address above 8 Pole KittyGail Jacobson 2205 Britely Terr College Park GA 30349 tel 1-404/763-0361 9 P-51Duane Gall 12800 Asbury Lakewood CO 80228 tel 1-303/969-9527 10 Pole Cat DenightBarrys Model Products Barry West 600 vincent Mt Dora FL 32757 1-904/383-1122 See next month CL Scale/Boss Continued page 67 about use electronic system recom mend investing Ni-Cds charger Both Ni-Cd battery supplies should provide about two hours system operation fully charged Insulated control lines Ted Cronenwett Ca noga Park CA Dale Campbell Newton NC shared following supplemented some investigation own Ted has prime source information elec tronic control series Coated stranded wire generally stainless steel used fishing line leader material can found Continued page 172 170 Model Aviation TEGHTA PE PROUDLY PRESENTS 5fMASIIN CjUA S TERJ * FINEST QUALITY MASKING KIT ON THE MARKET * LOWTACK LEAKPROOF ADHESIVE TAPE * EACH KIT CONTAINS * THREE 36 YD ROLLS OF VINYL MASK 2at3/161/4 *TWO 72YD ROLLS OF POLY MASK 114318 * THREE 6OYD ROLLS OF FINE-LINE MASK 1/8 1/4 1/2 * FINE-LINECRISPEDGE CUT STRIPING & DESIGN * CONFORMITY TO ALL MASKING SITUATIONS * FOR USE WITH NITRATE & BUTYRATE DOPES EPOXY PAINT POLY-U AND ENAMELS MAKE YOUR PAINT JOB COME ALIVE WITH THE BEST MASKING AND FINE-LINE TAPE EVER AVAILABLE TO MODEL BUILDERS NJSEND TDSATISFACTION GUARANTEED LOW KIT PRICE $ CHECK OR MO dd TECH TAPE GMASkING P0 BOX 230 2525 SHIP & HAND INCLUDED TECHkOLOGY LIVINGSTON NJ 07039 DEALER INQUIRIES WELCOME fishing tackle department sporting goods stores Ted Cronenwett uses 60-lb test wire called Sevalon available Fishermans Spot 14423 Burbank Van Nuys CA 91401 Ive using 80-lb-test stainless steel coated wire 025 wire/035 coating made Jeros Tackle Co Carteret NJ ob tainable through sporting goods stores Jeros wire comes 1000-fl rolls ranges 20- 210-lb test available nat ural black colored coatings Dale Campbell uses 90-lb-test Sevalon 024 wire/048 coating Ryan ST model Sevalon wire comes 30- 300- 1000-ft rolls Dale noted Netcraft Co 2800 Tre mainsville Rd Toledo OH 43613 also carries coated-wire fishing leader material under name Surfion nylon-coated sevenstrand stainless steel wire comes 30- WANT TO KNOW MORE Find INLET INLET quarterly publication Bob Violett Models company creates new technology model jets six issue subscription BVM Jet Pack send $1500 charge phone 1-800-899-1144 BOB VIOLETT MODELS 1373 Citrus Rd er Springs FL 32708 300-ft rolls took measurements samples 45- 60- 80- 140-lb-test Surfion wires re sults 45-lb-test wire diameter wire itself 018 overall diameter 028 coating Sixty-pound-test wire has 021 wire 032 overall diameter coating 80-lbtest wire has 024 wire 038 coating 140lb-test wire has 028 wire 041 coating Checking wire sizes against CL Fly ing Scale wire size tables page 106 AMA Competition Regulations handbook learned theres Surfion wire size satisfy multistrand requirements listed Surfion wire readily available can ordered directly Netcraft Prices 300-ft roll range about $12 45-lbtest wire $17 140-lb test youre fishing kind ask companys fishing tackle catalog its super Insulating line conneetors photos shows method insulating line connectors Pic tured top photo step 3M Scotchlok solderless electrical terminal auto supply stores 22-18 wire size would normally used insulation re moved will use insulating material connector TRANSMrrrER CASES *2995 each plus *300 S&H Great protection affordable pricel Fits 2 transmitters wlcharging units High impact luggage grade materials engineered resist dust & moisture e pieces protective foam can removed cut hold veriety items Built lockable handles 16 x 12 x 5 Direct sales e Greet Christmes gift deeP Florio Flyer Corporation 837 Johnsonburg Rd. St Marys PA 15887 18141834-2586 [ii] VISA MC Accept es add 6% sales tax Step B shows large brass eyelet taken Perfect products package %-in length small end insulation terminal Note insulation has slotted order squeeze force fit eyelet Step C shows completed line termination made coated wire insulated eyelet approximately %-in length copper tub ing termination completed remove insulating covering wire pro trudes crimped tubing Cut off excess wire about % crimp another small length about 14 tubing place shown Youll use tubing completing termination crimping wiring connects control lines model encoder box output line clip can now threaded onto completed line termination Step D shows completed lines wiring Deans connector linkage model en coder output line clips held rigidly place coating five-minute epoxy yet remain flex ible enough easy connection model lead outs control handles wire connections covered white black plastic insulation No10 electrical wire differentiate zq down control lines well signal lead white system ground lead black Control lines insulated manner can used kind handle bellcrank system prefer standard three-line bellcrank sys tem electronlc throttle control recommend making third line same material used electronlc control ensures lines unlform strength uniform flight drag completes two-channel electronlc control system Should decide make wish great success have questions need assist ance Ill glad helpor put touch someone can Drop line phone number Some sure have information add improvements offer Ill glad pass along other readers Contest dates recent issue Rocky Moun tain Aeromodelers newsletter Probable Cause has early listing upcoming 1991 contests West following contests will include Sport Scale event contest dates tentative Orbiting Eagles AnnualJune 9 Omaha NE Rocky Mountain CL ChampsJuly 6-7 Denver CO AMA NationalsJuly 13-21 Lawrenceville IL Top Class Summer BashAugust 10-11 peka KS Sunflower ClassicAugust 31September 1 Pawnee Rock KS Watch AMA Contest Calendar listings magazine date verification andlor changes Please send ideas notice upcoming CL Scale 172 Model Aviation QfnQri re-fuel engine between flights doesnt make sense re-fuel radio system flight batteries ANSWER YOUBETITDOES run out fuel land dead stick no problem run out radio well know rest story IR NA Tp RD FC LH GR HG TE BP1 RAPID CHARGE AAR PACK $1895 FC1R-1 CHARGER ER $5995 INTRODUCTORY COMBO PRICE $6995 Tel4081 778-9020 brochure Shipping handling -$300 CA Residents add 725% TAX Airborne Electronic Systems 16055 Caputo Drive #0 Morgan Hill CA95037 Send SASE Complete Lrstng products Aerospace Composite Products PO Box 16621 irvine CA 92714 714250-1107 events contest reports especially photos CL Scale activity address very top columnLi CL Aerobatics/McMiIIan Continued page 70 farmers another technique consider As Ive mentioned previous columns thin balsa sand wiches especially centers cut out can provide excellent strength little weight Layers %2 / ply equally well ap plication installing fuselage formers try gluing / x A-in piece across fuse perpendicular former creates Ibeam strengthens piece virtually no weight increase youre planning latest effort also analyze lay out pans grain going oriented What type wood grain will use application suggest scratch-building kit pieces beforehandat least major compo nents accomplishes couple things gets thinking about best piece allows use smaller bits time efficiently Big chunks time secm just hard come wood days triangulating Some months ago column recommended triangulating everything still layout some balsa wing skins foam cov ering saw recently showed grain run ning parallel trailing edge hinge line Though saves some balsa sheet per wing halt still dont recommend Run grain parallel leading edge gives trian gulation makes wing easier sand wind up torsionally stable panel Use triangulation elevators flaps too like cover stabs single piece per sur face use quarter-grain wood achieve desired stiffness solid surfaces run grain parallel trailing edge same effect Now tricky part Balsa alive will move sand paint wet can look stress relief Cut edge sheet true up edge wont necessarily end up true Wet side piece find bows Much depends what well grain wood piece unique maxim Whatever do both sides wood holds true very last coat paint Lets say build wing bows Dont give up happens us El Diablo just finished building major bow over inch set trailing edge course IGLOWaUG DESIGNED Puts sting engine FOR LONGER HIGHER5 Get starts GloBee Unique flat-wound spiral coil element high temperature glass-to-metal seal add up faster ignition increased RPM GloBee plugs specified original engine manufacturers purchased over over again Pylon control line racers find GloBee plugs best GloBee plugs designed fit popular engines used today unavailable locally write call Twinn-K collect pricing & delivery information & FREE Catalog MAKE THE GLOBEE / INDY CONNECTION Twinn-K Inc 10296 W Washington St Indianapolis IN 46231 Telephone 317-839-6579 FAX 317-839-8928 limits heres corrected problem First mixed some ammonia water loosen chemical bonding balsa al low its shape molded After saturating bowed part ammonia-water mixture pinned wing building board tips braced opposite bow Since springback usually about 50 percent used amount about equal opposite bow must admit took few times get right persever ance paid long run technique will work raw balsa part dont try painted surfaces can use twisted fuselages pressure must ap plied opposite existing twist until part completely dryLI CL Speed/Lee Continued page 71 much noise think Ill put wheels use demonstrations air shows grass fields Talking about jets Doug Dahlke friend stunt flier Oshkosh Wisconsin sent clipping news item about some experimental jets believe flown Air Force 1 years ago airplanes powered engines built using five Dyna-Jet heads mounted front 6-in diameter tail pipe about four feet long engines pro duced about 30 pounds thrust mounted Control Line models flown 200ft lines Controls extended through swivel connections pylon flying station out side circle Speeds attained over 200 mph single-engined model speeds werent mentioned twin engine job sound like quarter-scale airplanes before RC craze took over Writing column fun could use input Speed fliers Ive stunt RC modelers call usually looking power and/or better reliability Stunt fliers want smooth steady runs RC fliers want everythingI have never claimed expert can usually get stuff run fairly well bought brand new 05 28 RC engine swap shop other day five bucks Someone tried take apart before running really messed up ring broken pieces chewed up piston sleeve chunks broken out exhaust stack prying screwdriver dont know Serious Helicopter Hot Dogging SjX-Pf PISTON/CYLINDER Superior Horsepower w/ Tuned Pipes True ABC Construction Finest Materials & Workmanship Arch Port Available OS SFN-RFN Other Types & Sizes Available Pattern Racing vi BLI ES Send $1 00 complete Catalogue Engines Accessories PERFORMANCE SPECIALTIES 729-1658 PO Box 4003 Carlsbad CA 92008 March 1991 173